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Proceedings Paper

Comparing slow-light properties of 10Gbps RZ data in dispersion shifted fibers and highly nonlinear fibers based on Raman-assisted optical parametric amplification
Author(s): Zhaoyang Hu; Daniel J. Blumenthal
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Paper Abstract

We compared experimentally the properties of optically controlled tunable time delay based on a Raman-assisted optical parametric amplifier (OPA) with different gain media of normal dispersion shifted fibers (DSF) and highly nonlinear fibers (HNLF). The Raman-assisted OPA using the DSF has previously been demonstrated to obtain large light delay for one single pulse. Position optimization of pump wavelength according to zero dispersion wavelength of the fibers results in narrow band gain spectrum through a parametric process. Stimulated Raman scattering further modifies the shape of the gain spectrum. The modified gain spectrum with sharper transitions leads to a large group index change so that large time delay can be achieved. In the paper, we experimentally demonstrated propagating 10Gbps return-to-zero (RZ) optical packets through slow-light fiber delay line based on the Raman-assisted OPA with above 100ps time delay. We also experimentally compared the gain, the bandwidth and the time delay versus variable pump powers for the Raman-assisted OPA by using 1km-long DSF and 1km-long HNLF as the gain medium, respectively. While smaller time delay was obtained in the slow-light scheme using HNLF due to its wider gain spectrum, lower pump power threshold was found compared to that using DSF. In the experiment, we found that the slow-light scheme has THz gain bandwidth and indicates that slow light could be achieved at higher bit rates with further optimized system parameters.

Paper Details

Date Published: 8 February 2007
PDF: 8 pages
Proc. SPIE 6482, Advanced Optical and Quantum Memories and Computing IV, 64820I (8 February 2007); doi: 10.1117/12.716395
Show Author Affiliations
Zhaoyang Hu, Univ. of California, Santa Barbara (United States)
Daniel J. Blumenthal, Univ. of California, Santa Barbara (United States)


Published in SPIE Proceedings Vol. 6482:
Advanced Optical and Quantum Memories and Computing IV
Zameer U. Hasan; Alan E. Craig; Selim M. Shahriar; Hans J. Coufal, Editor(s)

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